#include <stdio.h>

void main(){
    printf("%d\n",sizeof(float));
    printf("%d\n",sizeof(double));
    printf("%d\n",sizeof(long double));

    float a;
    double b,c;
    a=123.456789;
    b=a;
    c=123.456789;
    printf("%lf\n",a);
    printf("%lf\n",b);
    printf("%lf\n",c);
}